Re: [PATCH v8 02/20] xfs: Check for -ENOATTR or -EEXIST

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On 4/6/20 7:31 AM, Brian Foster wrote:
On Fri, Apr 03, 2020 at 03:12:11PM -0700, Allison Collins wrote:
Delayed operations cannot return error codes.  So we must check for
these conditions first before starting set or remove operations

Signed-off-by: Allison Collins <allison.henderson@xxxxxxxxxx>
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
  fs/xfs/libxfs/xfs_attr.c | 15 +++++++++++++++
  1 file changed, 15 insertions(+)

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index 2a0d3d3..f7e289e 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -404,6 +404,17 @@ xfs_attr_set(
  				args->total, 0, quota_flags);
  		if (error)
  			goto out_trans_cancel;
+
+		error = xfs_has_attr(args);
+		if (error == -EEXIST && (args->attr_flags & XATTR_CREATE))
+			goto out_trans_cancel;
+
+		if (error == -ENOATTR && (args->attr_flags & XATTR_REPLACE))
+			goto out_trans_cancel;
+
+		if (error != -ENOATTR && error != -EEXIST)
+			goto out_trans_cancel;

I'd kill off the whitespace between the above error checks. Otherwise
looks good to me:

Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
Alrighty, will do.  Thanks!

Allison

+
  		error = xfs_attr_set_args(args);
  		if (error)
  			goto out_trans_cancel;
@@ -411,6 +422,10 @@ xfs_attr_set(
  		if (!args->trans)
  			goto out_unlock;
  	} else {
+		error = xfs_has_attr(args);
+		if (error != -EEXIST)
+			goto out_trans_cancel;
+
  		error = xfs_attr_remove_args(args);
  		if (error)
  			goto out_trans_cancel;
--
2.7.4





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